Processing device and processing method for rock sample end face

Abstract

The invention discloses a machining device and a machining method for end surfaces of rock samples. The machining device comprises a base, a lifting mechanism, a first motor, a sample clamping mechanism, a grinding mechanism and a pressure sensor, wherein the lifting mechanism is mounted on the base, and can perform lifting movement in the vertical direction; the first motor is arranged on the lifting mechanism; the sample clamping mechanism is in transmission connection with the first motor, and is used for clamping the rock samples to arrange the rock samples in the vertical direction; the grinding mechanism comprises a second motor arranged on the base, and a grinding platform in transmission connection with the second motor; the grinding platform is arranged in the horizontal direction; abrasive papers can be fixedly arranged on one side of the grinding platform; the pressure sensor is used for measuring upward force applied to the clamping mechanism by the grinding platform; and the lifting mechanism is controlled according to data obtained through measurement by the pressure sensor. The machining device can polish the end surfaces of easy-ruptured rock samples in such rock layers as shale to guarantee the flatness of the end surfaces of rock cores.

Description

Technical field [0001] The invention relates to the technical field of rock mechanics, in particular to a processing device and a processing method for the end face of a rock sample. Background technique [0002] The development of shale gas in my country is in full swing. The mechanical parameters of shale rock are important parameters in the development process of shale gas. The main method of obtaining them is through indoor rock sample testing. The core size has strict requirements, usually specific sizes such as φ25×50mm, φ50×100mm, etc. are required. In particular, there are strict requirements for the end face parallelism of the rock sample, that is, the parallelism must be less than 0.1mm. Therefore, the end face of the rock sample to be tested must be polished. However, shale is very different from sandstone. Its bedding is relatively developed and brittle, and it is very easy to fracture along the inside of the layer. Therefore, the core and the grinding wheel cannot co...

AI Technical Summary

Problems solved by technology

[0003] Existing rock end face processing devices are mainly aimed at sandstone and other homogeneous rocks, and the mechanical grinding method of lathe is usually used, but for example, shale and other beddings are relatively developed and brittle, and rocks that are easily broken along the inside of the layer cannot be used with lathes. Mechanical grinding method

The reasons are as follows. During the grinding process, the grinding wheel needs a certain amount of feed. Each time the cutting rock is separated from the grinding wheel for a short time, the moment the grinding wheel contacts the rock after the cutting is in contact with the rock, it is very easy to produce gap, therefore, there is an urgent need for a rock sample end face processing device and processing method to solve the above problems

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